Cobalt Bits

Cobalt drills are an excellent compromise. Harder the HSS drills, less brittle than Tungsten Carbide but can still be sharpened to extend their usable life. Expensive but probably worth the investment if you can afford them.

Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)
Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)
4.0
£37.89
BUY NOW
Amazon.co.uk
Bosch Professional 2608587014 19-Piece HSS-Cobalt ProBox Metal Drill Bit Set (for Stainless Steel, Accessories for Drill Drivers), Gold, 1mm-10mm
Bosch Professional 2608587014 19-Piece HSS-Cobalt ProBox Metal Drill Bit Set (for Stainless Steel, Accessories for Drill Drivers), Gold, 1mm-10mm
5.0
£39.89
BUY NOW
Amazon.co.uk
HPMAISON True 5% Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Twist Drill Bits 1.5mm-6.5mm, 135° Split Point Extremely Heat Resistant for Stainless Steel, Cast Iron, Hard Metal, Plastic, Wood
HPMAISON True 5% Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Twist Drill Bits 1.5mm-6.5mm, 135° Split Point Extremely Heat Resistant for Stainless...
4.0
£10.98
£9.99
BUY NOW
Amazon.co.uk
Amazon price updated: 2025-08-30 15:06

Use to...

• Drill out sheared shafts.

• Drill a shaft to use a T-piece.

• Drill out a damaged thread.

Buying Tips

• Cheap ones may bend or fracture.

• Can be sharpened to extend usable life.

Safety Tips

• Always wear eye protection.

• Always wear hearing protection.

• Consider impact protection.